How to identify the quality of eggs?

See below for identification methods:

Place the egg in the water and see if it floats. If the eggs sink horizontally to the bottom of the bowl, they are the freshest; If the egg stands up, but one end is still in contact with the bottom of the bowl, it is not very fresh. Crack the eggs and see if there is any smell.

This odor is a very pungent foul odor that can sometimes be smelled before the eggs are cracked and should be thrown away in time.

You can gently shake the egg, if there is a shaking sound in the egg, it means that the egg is not good, you can also put the egg in the water, if it floats, it means that the egg has deteriorated. If you shine a flashlight on an egg, if there is something black inside the egg, it means that the egg is broken.

According to the color of the surface of the egg, if it is particularly bright and the gloss is relatively high, it means that the quality of the egg is relatively high; Judging by the sound, good eggs generally have a stronger sound quality.

It can be identified by the shape of the egg, the color of the egg, the quality of the egg, and the holes of the egg, so that the quality of the egg can be distinguished.

It can be judged by color, by size, by the origin of the egg, by the condition of the yolk, and by the taste.

How to distinguish the quality of eggs, eggs are the most common food in life, we will use eggs to make a variety of dishes, very delicious, so it is loved by everyone, but we also need to observe carefully when buying eggs, let's learn how to distinguish the quality of eggs.

1. Don't buy the so-called "eggs before the soil".

The Anhui Academy of Agricultural Sciences and the China Agricultural University found that the salmonella infection rate of free-range eggs in the region has reached far higher than that of ordinary eggs, and the contamination rate of E. coli is as high as 80%. The free-range conditions are not as sound as the breeding environment, although the taste is better, but it is not necessarily healthier, do not buy at will.

2. Observe the surface of the eggshell and smell the smell

If the egg cracks, it is easy to spoil, and the rancid smell of the egg is also very obvious. So, when buying eggs, don't be afraid of trouble, to see if the eggshell of the egg is smooth and complete, and whether there is any peculiar smell;

3. Shake the egg to determine whether it is yellow

The biggest possibility is that the eggs are not fresh and spoiled, and of course it is not excluded that they were impacted during transportation. When a yellow egg is shaken, it feels like water, while a normal egg is uneven, a bit like a solid mass.

4. Clean the surface of the eggs before opening.

Eggs'Most of the surfaces have not been cleaned during transportation, and most of the germs are also on the eggshell (Salmonella can penetrate), and washing can reduce the harm of germs to a certain extent.

Appearance identification

Observe the appearance of the eggs. The egg shell has a layer of hoarfrost powder, which is not very smooth when rubbed by hand, and the fresh egg with a complete appearance is fresh, and the egg with a smooth and dark, incomplete and cracked shell is not fresh.

Auditory identification

Listen to the sound by shaking the egg by hand. When buying eggs, pinch the eggs with your thumb, index finger and middle finger and shake them, the ones that have no sound are fresh eggs, and the ones that make a shaking sound when shaking by hand are bad eggs. The louder the sound, the worse it is.

Eye-to-eye identification

Look at the color when the light shines. Gently hold the egg with your hand and observe the light, the good egg protein is clear and translucent, with a small empty room at one end, and the bad egg is gray and dark, and the empty room is larger. Some eggs have stains, which is a sign of stale or spoilage.

Physical identification

Let the eggs float on the salt water. Take 500 grams of water, add 500 grams of salt, dissolve, put the eggs into the water, sink at the bottom of the water is fresh eggs, the big head is on the top, the small head is slightly floated below, the lead is quietly cleared is that the eggs are put for too long, completely floating on the water, it is a bad egg, this kind of egg has been rotten and spoiled.

1. See if the egg yolk is full, convex and tough.

Fresh egg yolks will be plump, raised, and resilient when beaten on a plate or bowl; Stale egg yolks are loose and flush with egg whites. There is a layer of egg yolk film between the egg yolk and the egg white, which has a certain elasticity, and with the extension of storage time, the elasticity of the egg yolk film will be weakened or even broken, so there will be a situation where the egg yolk is scattered.

2. See if the egg whites are formed.

Fresh egg whites will be round or oval in shape, while fresh egg whites have no shape. Egg whites are viscous gelatinous substances, and with the prolongation of storage time, under the action of proteases, the mucins in egg whites are gradually dehydrated, and the egg whites will slowly become thin and not formed.

3. See if the egg whites are layered.

After the fresh egg is opened, the egg white will have a clear layer, which is divided into three layers, namely: the outer thin egg white, the middle thick egg white, the inner thin egg white, and each with a membrane in the middle. With the extension of storage time, the pH value of egg white gradually increases, and the part of thick egg white gradually becomes thinner, and the delamination is not obvious.

4. See if there are ties on both sides of the egg yolk.

Fresh egg yolks have two spiral white frenulum at the blunt end and on either side of the tip, like two small tails, that hold the yolk in place between the thin and thick egg whites inside. As the storage time increases, the frenulum will gradually disappear and the yolk will move away from the middle.

Eggs are nutritious and delicious, teach you the tricks to identify eggs, and you will never be afraid to buy bad eggs again.

1. Whole eggs.

An easy way to tell the freshness of a raw egg taken from the refrigerator is to look at the porosity of the shell. Fresh eggs have a tiny air sac at the end between the shell and the membrane, which gradually expands as the egg ages. As a result, the freshness of an egg can be identified by gently cracking it into a bowl or glass of unsalted water.

If it sinks to the bottom and turns sideways, it is extremely fresh. Eggs that are more than a week old will tilt slightly upwards but still touch the bottom. Eggs that are more than two weeks old stand upright or with the wide ends facing up, but are still edible.

If the eggs are floating on the surface, usually eggs that are more than 4-5 weeks old, they should be discarded. Also, fresh eggs have no sound when shaken, while bad eggs make a sound because of the air sacs inside the shell.

2. Broken eggs.

Eggs that have been too old usually have a foul, sulphurous smell when they are broken. Visually, the opened fresh egg yolk should be a bright yellow color surrounded by gelatinous rings. Aged eggs are pale in color and will spread flat.

Surprisingly, fresh eggs are slightly cloudy in their whites, while aged eggs are very clear.

Although blood spots in egg whites are not an indicator of freshness, eggs that are pale pink, green or black in color are definitely spoiled and should be discarded. In addition, fresh egg shells are difficult to remove after cooking, while the shells of aged eggs are easy to peel off.

3. The impact of freshness.

Fresh eggs are best boiled or fried; Semi-fresh eggs can be made into omelettes or baked; Older eggs can still be used to make mayonnaise.

Soak the eggs in cold water, horizontally in the water, sink to the bottom to indicate freshness, tilt or erect to represent aged eggs; Floating on the surface of the water indicates deterioration.

Answer 1: Put the egg between your fingers and shake it in your ear, there is no abnormal feeling, you can shake it again with more force, and there is no sound when the fresh egg is solid. Rotten eggs have the sound of slag, and the big ones have the sound of hollowing.

The cracked egg has a crackling sound. The sound of water is the eggs that have been left for too long.

2. Method 2: The surface of the egg is uneven, and there are granular things to the touch, so don't choose, this is not a fresh egg.

3. Method 3: Hold the egg with both hands like a cylinder, and look through the sunlight or light, if the egg is reddish, translucent, and the yolk outline is clear, it is fresh; If it looks dull, opaque, or stained, the egg has gone bad.

How to tell the difference between good and bad eggs, learn these three tricks, and you will benefit for a lifetime.

Shake it gently, there is a shake in it, it is fresh. If not, it's expired.

How to distinguish fresh eggs.

1 Can be transmitted by daylight Hold it in a circle with your left hand, put the egg at the end of the circle with your right hand, and transmit it to the daylight, the fresh egg is reddish and translucent, and the yolk outline is clear; If it is dim, opaque or stained, the egg has gone bad. 2 Observable eggshell A layer of frosty powder is attached to the eggshell, the color of the eggshell is distinct, and the pores are obvious fresh eggs; Aged eggs are the opposite and have a greasy texture. 3 You can shake it gently with your hands The silent ones are fresh eggs, and the ones with the sound of water are old eggs.

4 You can test it with cold water If the egg is lying flat in water, it means that it is very fresh; If it is tilted in the water, it has been stored for at least 3 to 5 days; If it stands upright in the water, it may be stored for up to 10 days, and if it floats on the water, there is a possibility that the egg has gone bad, and it is not recommended to buy it.

How to distinguish a fake egg.

According to the advice provided by experts, you can identify the authenticity of eggs from the following aspects: Fake eggsThe color of the shell of a fake egg is brighter than that of a real egg, but it is not too obvious. If you touch the shell of a fake egg with your hand, it will feel a little rougher than the real egg.

There is a sound when the fake egg is shaken, because the moisture is spilling out of the coagulant. Sniff it carefully with your nose, and the real eggs will have a faint fishy smell. Soon after the fake egg is opened, the yolk and egg white will melt together.

This is because egg yolks and egg whites are made from homogeneous ingredients. When frying fake eggs, you will notice that the yolk falls apart naturally without stirring. This is because the film containing the artificial egg yolk cracks open when heated.

Look at the color and weight, the color is not bright, and the light weight or pick up and shake it can be distinguished.